15 Front USB 2.0 connector
16 Parallel connector
17 Serial (COM2) connector 18 PCI Express x1 card slots (2)
19 PCI Express x16 graphics card slot 20 System fan connector
21 E-lock connector 22 Microprocessor socket
23 Cover presence switch connector (Intrusion switch
connector)
24 Coin-cell battery
25 Memory slot (DIMM1) 26 Memory slot (DIMM2)
27 Memory slot (DIMM3) 28 Memory slot (DIMM4)
29 Keyboard and mouse connector
Machine type and model label
The machine type and model label identifies the computer. When you contact Lenovo for help, the machine
type and model information helps support technicians to identify the computer and provide faster service.
The machine type and model label is attached on the computer as shown.
Figure 4. Machine type and model label
6 ThinkCentre M720t User Guide and Hardware Maintenance Manual